Underclearer mounting in textile spinning, preparing, and like machines



', PREPARING, AND LIKE MACHINES w WILSON May 16, 1939.

UNDERCLEARER MOUNTING IN TEXTILE SPINNING F iled May 14, 1938 2Sheets-Sheet l Inns/fi I I, /I w May 16, 1939. w w s 2,158,921

UNDERCLEARER MOUNTING IN TEXTILE SPINNING, PREPARING, AND LIKE MACHINESFiled May 14, 1938 2 Sheets-Sheet 2 Patented May 16, 1939 UNITED vSTATES MOUNTING IN TEXTILE. SPINNING, PREFIARJNG, AND MA- canvas 7 IWilliam Wilson, Accrington, England, assignor to Howard and Bullough,Limited,

Accrington,

Lancashire, England, a British company Application May 14, 1938, SerialNo. 208,034

- I In Great Britain May 18, 1937 1 Claim. (ci. 19 14o') 1 v A of therollerstand. The shaft I is also utilised The invention has reference tothe mounting of the underclearer rolls in the drafting apparatus oftextile spinning, preparing or speed frames and like machines, and itsprincipal object is to provide an improved form of such mounting wherebythe underclearers may be rendered accessible for stripping as completelyand as expeditiously as possible. A further object is to providemounting means which will be of the simplest possible form ofconstruction and embodying a minimum number of component parts, in orderto minimize the initial cost of manufacture and so that the timerequired for cleaning the same may be as short as possible.

An underclearer mounting in accordance with the said invention comprisesa pivotally mounted rocking lever adapted to support the underclearerroll at its free end where it is also provided with a finger-piece orhandle for movement out of the operative position to a position in whichthe roll is easily accessible for stripping.

The invention is further characterised by pivoting the rocking leverabout a centre so disposed relatively to the operative position of theunderclearer and the centre of the associated draft roller that, whenmoved from the operative position, the rocking lever must pass over adead (zentre, and the seating of the underclearer roll is adapted toyield sufiiciently to permit of such 3 movement at the times desired.

Adjustable stops, abutments or the like, may be provided for regulationof the precise settings of the underclearer in the operative andstripping positions.

The nature of the invention is hereinafter more fully described withreference to the accompanylng drawings, in which Fig. 1 is a side viewof the drafting apparatus of a ring spinning frame, having the mountingof the underclearer of the back 40 roller constructed in accordance withthe present invention. Fig. 2 is more or less a diagrammatic view of therelevant portion of the apparatus illustrated in Fig. 1, showing theunderclearer mounting in the retracted or stripping position.

45 Fig. 3 is an elevation of the underclearer mounting shown separately,and Fig. 4 is a detail view in perspective of the cushioning springemployed in the underclearer bearing.

In the drawings, 5 represents the back or feed 50 roller of the draftingrange and 6 a single tape employed in the intermediate stage betweensaid roller 5 and the front roller 1, said tape 6 being guided over atensioning roller 8 which is supported by a bracket 9 pivotallysuspended from a 55 fixed shaft running longitudinally along the rear tosupport a bracket ll off-set forwardly therefrom, and upon a pivotalstud I2 fixed in said bracket is mounted a rocking lever [3 of which thefree extremity is provided with an open bearing I3I forming a seatingfor the shaft-journal Ml of the underclearer I4. It will be understoodthat each underclearer I4 is supported at its centre by a rocking lever[3 which is carried by a fixed bracket II and all such brackets H aremounted upon the common shaft 10.

Each rocking lever I3 is provided with an integral tail-piece [32adapted to impinge against the shaft I0 in such manner as to limit theforward movement of the rocking lever about its pivot I2. In addition,an adjustable stop, formed by a locked setscrew I32a passing through thetail-piece I32, may be provided for each rocking lever 13, for use inthe circumstances hereinafter referred to.

In the operative position of the rocking lever, i. e. as illustrated inFig. 1, the underclearer roll [4 presses against the back roller 5 androtates in contact therewith, the pressure between the underclearer l4and the roller 5 being suificient to maintain the former in itsbearings. A fingerpiece is provided at the free end of each rockinglever l3, consisting of an integrally formed oifset projection l5extending rearwardly to a point in which it is easily accessible fromthe rear of the roller-stand, and the arrangement is such that bypressing downwardly on said finger-piece [5 the lever 13 may be pivotedabout its pivot l2 into a position in which the underclearer roll I isreadily available for stripping or removal. In this position,illustrated in Fig. 2, the rocking lever 13 rests against the aforesaidhorizontal shaft [0.

The arc of travel of the underclearer roll l4 between the operative andstripping positions is arranged to intersect the line joining thecentres of the pivot l2 and the back roller 5, so that the rocking leverl3 must pass over a dead centre when moving from the operative positioninto the stripping position, and in order that the underclearer roll [4may yield downwardly to a suflicient extent to enable it to pass beneaththe periphery of the roller 5, the seating of the bearing l3l isfurnished with a spring [6 upon which the shaft journal HI of theunderclearer may rest, said spring being arranged normally to urge theunderclearer I4 against the roller 5. By these means I ensure that thelever 13 will not be inadvertently displaced from the operative positionduring working by the rotary action of the roller 5 on the underclearerroll [4. The spring l6 may be provided with projecting tongues IBI, asshown in Fig. 4, which are adapted to register with and enter slots orrecesses in the sides of the lever I3, thus retaining the spring H5 inposition.

In the particular form of drafting apparatus illustrated in theaccompanying drawings, the underclearer mounting can be so arranged asto allow the underclearer roll I I to rest lightly against the face ofthe belt or tape 6 to clear waste fibres therefrom, and the pressurewith which the underclearer I4 is allowed'to bear against said belt ortape may be varied by regulating the adjustable stop hereinbeforereferred to as being provided in the tail-piece I32 of the lever I3, soas to vary the scope of pivotal movement of the rocking lever l3 to therequired extent.

In another embodiment of the invention, not shown, the form of mountingherein described is applied to an underclearer working in conjunctionwith a front drafting roller; in such case,

the rocking lever may be arranged to pivot forwardly out of theoperative position to a point at which it is readily available to theoperative standing in front of the roller stand.

What I claim as my invention and desire to secure by Letters Patent is:

In a textile machine, a drafting roller, an underclearer roll, a shaftextending longitudinally throughout the machine, a bracket ofiset fromsaid shaft, a rocking lever pivotally mounted on said bracket andsupporting the underclearer roll at its free end, a finger-piece on saidbracket for swinging the latter to a position in which the roll iseasily available for stripping, and a tailpiece on saidlever engageablewith said shaft for limiting the movement of the lever.

WILLIAM WILSON.

